Surface condenser installation



March 24, 1925;

' w. A. DEXTER summon CONDENSER INSTALLATION Filed Dec. 4, i923 Fscn 1-1EA TER Patented Mei-nZA, 11925. I i

, w m 'mnj A. Dem-sew L SGOW; SCOTLAND.

"seamen connnnsna- ZIZNSTALIQATION.

I Application file d' December 4,1923. Serial 1107678387.

' new land useful Improvement in Surface Condenser Installations, ofwhich the fol-1 lowingjis a'sp'ecification.-

erinstallations having provision for maintaming a constant load pump.

Such installations-usually include a collecting box or chamber locatedbelow the main condensenior'the reception of condensate from the maincondenser and a certritu' gal condensate pump connected on its suc-,

, tion side to the colle'ctingbox and onits discharge side to anoverhead tank connected directly to the feed heater, and, by"an equalizing pipe, to the collecting box.

Heretofore the overhead tank has been, of necessity, located at aconsiderable elevation, usually higher than 'the;e ec tor ai1\ ump I I!provided in such inst In the installation of the invention accord- 1 ing"to. apreferred; embodiment the o verthead tank is] formed asra' sealedchamber from which a connection is taken directly to the feed heater andthrough the feed "heater to the feed supply feed pump or feedtank) r iso that thecondensate pump serves to create an artificialjhead and thatthe feed heater and'the feed pump orthe teed tank may be situatedconveniently ithout necessitytfor providing a substantial static head.

a feed heater a measuringdevicewhich serves overheadWtank. v Fig. {2' isa sectional de- There is desirablyincorporated in the connection fromthe overhead tank' to the to'measure the total quantity of condensatepassing to the feed heater, so that, When'it is desired to ascertainthe'quantity' of steam condensed in the condenser, it is 'merely densedin the Jet condenser 18 connected with requisite to subtract from;thequantity measured by the meter thekcalculated quantity of steam usedin operating the stages of the; ejector air pump, a, i ,7

i The invention is illustrated in the, accom- "panying drawing n whichFig. 1 1s a diagram of'an' installatlon including asealed tail viewzofthe ejector 'air pump.

, Referring to Figsi-l] and2, 1 denotes ,the' main condenserbelow'vvhich is located a col- Be .it' known that I, WILLIAM ALLrNsoNThis invention relates to surface condens on. the condensate lecting boxor chambery2 connected to the ,mam condenser and serv ng-for thereception of condensate from the condenser. The centr fugalcondensate'pump 3 is connected onits suction sideby the pipe 3 "to thecol- 1 i lectingbox 2 and on its discharge side by a discharge pipe 4 toan overhead tank 5.

Thetank 5 is connected to the feed heater 6 v by piping 7 and. to thecollecting box 2 by an equalizing pipe 8, theflow of Water from I thetank 5 -to the box 2 being automatically regulated by a; valve 9controlled by a float 9; The function of the pipe 8 isto return acontrolled quantity of water-from the tank 5 to the box 2 so as to"maintain a constant level in the box 2 and consequently a constant load,on the condensate pump 3; the quanvtity of water passing through the]piping 7 represents the difierencebetween the quan tity discharged bythe pump 3' through the plpe 4 and the quantity returned from the tank 5to the box Qthrough the pipe 8, being equal to the quantity of waterentering the box-2 from the condenser 1 plus a determiis nate increment,as hereinafter explained.

Thetank 5 isformed as a sealed chamber the connection from which to thefeed heater 6 is controlled by a manually regulatable 'springdoa'dedvalve 1O, the said connection 1 v extending through the feed'heater 6130 the 3 o feed pump 11. M I

12 denotes a Venturi-meter which serves to measure' the total quantityof condensate passing through the piping 7 to the feed heater-6. Toascertain the quantity of steam condensed in the condenser, there issubtracted from thequantity measured by the meter the calculatedquantity of steam used in operating both stages 16, 16 of the ejectorair pump, the primary stage 16 of which is connected by a valved pipe 16with the condenser 1.

Steam from the primary stage 16 conthe tank5 byuthe valved pipe 18passes with the injection Water by way of the connection l9'to thecollector box 2 and into the closed circulation system,the connection 19having a returnbend with a valved branchior air The tank ,5 hasian airvent controlled by, a valve 14: pernnttlng discharge of anyfrom.

the closed system.

15 denotes anormally closed thermostatic valve for by-passingoverheatedWater;-from; the feed heater (3 to the condenser 1 by way ofthe connection 15. V

For convenience of illustration the tank 5 isshoWn-as'beingat aconsiderable eleva tiOIlv' hat I 'clainris 1. In a surface condenserinstallation, in combination, a main condenser, a collecting boxconnected to said condenser, a tank, a

condensate pining havingits inletconnected to said box and itsout-letconnected to said tank, an equalizing {131198 :for returning partof the'condensa'te'from said tank to-said box,

afloat valvecontrolling the passage oi con-- densate from-said tank tosaid box, andmaintaining a constant level in said box, a feed supply, afeed heater, and a connect-ion from said tank to said'feed supply by-Way of said heater, saidtank being formed as a sealed chamber so thatsaid condensate pump creates an artificialhead insaid connection,permitting location of said 'feedsupply and said heater at anyconvenient location with out necessity for providing a substantialstatic head.

21111" a surface condenserinstallation, in combination, a maincondenser, a collecting box ,connected to; ,said condenser, a tankformed as a sealed chamber, a. condensate ,pump liayingzitsinletconnected to said box and its outlet connected to said tank, anequalizing pipeyconnecting said tank and said box, a float valvecontrolling the passage of condensate afronrsaidtank to said box formaintaining 'a constant-levelin said box, a feed -supply,:a feed heater,an ejector air pump havingconnections with said condenser, with saidtank, \vithsaid box and with said heater, a-connection-from said tank tosaid feed supply by rway of saidheater, and a measuringdevice-incorporated in said connection, serving to measurewthe totalquantityot condensate passing to said heater.-

In testimony whereof I have signed my name to thisspecification in thepresence of two subscribing Witnesses.

- W. A. DEXTER,

\Vitnesses:

lsannr. R'oLLo, Jn'ax MoPHnnsoN.--'

